Measuring instrument for air pollution



FIG. 1 is a front perspective view of a first embodiment of a measuring instrument for air pollution showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a bottom perspective view thereof;

FIG. 9 is a front perspective view of a second embodiment of a measuring instrument for air pollution showing our new design;

FIG. 10 is a front view thereof;

FIG. 11 is a rear view thereof;

FIG. 12 is a left-side view thereof;

FIG. 13 is a right-side view thereof;

FIG. 14 is a top view thereof;

FIG. 15 is a bottom view thereof; and,

FIG. 16 is a bottom perspective view thereof.

The even-dash broken lines illustrating portions of the measuring instrument for air pollution form no part of the claimed design. 

CLAIM The ornamental design for a measuring instrument for air pollution, as shown and described. 